lonelyplanet/phoenix_elixir repository overview

Most up to date readme can be found here⁠

⁠Build a new Phoenix Application

The following commands will mount the current directory and create a Phoenix application in a new directory "test". Because docker run's as root normally you then need to make sure you change ownership back under your user.

docker run -v $PWD:/code -it lonelyplanet/phoenix-elixir:latest phoenix.new test
sudo chown -R $USER:$USER ./test

⁠Creating Your Project's Dockerfile

In your project's base directory build a Dockerfile using this an example:

FROM lonelyplanet/phoenix-elixir:latest

ENV MIX_ENV prod
ENV PORT 4000

ADD . /code
RUN mix deps.get
RUN npm install && /code/node_modules/brunch/bin/brunch build /code/
RUN bash -c "mix compile.protocols 2>&1"
RUN mix phoenix.digest
CMD elixir -pa /code/_build/prod/consolidated -S mix phoenix.server

This should be able to host your application in a production like environment.

⁠Developing With Docker-Compose

Use docker-compose to override and develop your project. Here is an example of a docker-compose.yml file:

database:
  image: postgres
  expose:
    - "5432"
app:
  build: .
  command: bash -c "npm install && mix phoenix.server 2>&1"
  volumes:
    - .:/code
  links:
    - database:database.local
  ports:
    - "4000:4000"
  environment:
    MIX_ENV: "dev"

Note: In your config/dev.exs you'll want to make sure you hostname is set to database.local. The default username and password of postgres should work.